Internal Server Error 500 No response from subprocess (php): subprocess was killed with signal 11

PPNSteve

Well-Known Member
Mar 13, 2003
413
3
168
Somewhere in Ilex Forest
cPanel Access Level
Root Administrator
Twitter
Trying to view the INBOX in horde webmail app I'm getting this error:

Code:
Internal Server Error

500

No response from subprocess (php): subprocess was killed with signal 11
Al the other mailboxes including a rather full spam box work, its only affection this one inbox on this one specific user.

Fixed mailbox permissions, restarted cpsrvd and forced an cPanel update - still getting error..

UPDATE: adding error logs from Roundcube;
Code:
[email protected] [/var/cpanel/roundcube/log]# tail -100 errors
[08-Jan-2014 22:19:10 UTC] Unexpected condition from IMAP server, closed or corrupt connection to IMAP. Possible mailbox corruption.
[08-Jan-2014 22:19:10 UTC] PHP Warning:  fclose() expects parameter 1 to be resource, null given in /usr/local/cpanel/base/3rdparty/roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 201
[08-Jan-2014 22:19:18 UTC] Unexpected condition from IMAP server, closed or corrupt connection to IMAP. Possible mailbox corruption.
[08-Jan-2014 22:19:18 UTC] PHP Warning:  fclose() expects parameter 1 to be resource, null given in /usr/local/cpanel/base/3rdparty/roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 201
[08-Jan-2014 22:19:25 UTC] Unexpected condition from IMAP server, closed or corrupt connection to IMAP. Possible mailbox corruption.
[08-Jan-2014 22:19:25 UTC] PHP Warning:  fclose() expects parameter 1 to be resource, null given in /usr/local/cpanel/base/3rdparty/roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 201
Any suggestions on a fix???
 
Last edited:

PPNSteve

Well-Known Member
Mar 13, 2003
413
3
168
Somewhere in Ilex Forest
cPanel Access Level
Root Administrator
Twitter
Re: Internal Server Error 500 No response from subprocess (php): subprocess was killed with signal

OK desperation sat in and we ended up doing a swap between mail services, switched from dovecot to courier and then back again, to resolve this.

This may work for you as well.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,201
363
Re: Internal Server Error 500 No response from subprocess (php): subprocess was killed with signal

Hello :)

There are a few different potential causes of this type of error message. I have seen this happen due to a corrupted dovecot.index file within the email account's mail directory. Thank you for updating us with the outcome. Feel free to let us know if the issue occurs again.